TY  - RPRT
TI  - Pavlovian conditional stimuli cannot always be defined solely in physical terms.
AU  - H Lachnit
AU  - W Pieper
AU  - A Hilpert
AU  - H D Kimmel
DO  - 10.1007/bf02700427
UR  - https://pubmed.ncbi.nlm.nih.gov/3231495/
ID  - 3231495
ER  -